第一部分：英语知识运用（共两节，满分50分）
第一节：单项填空（共20小题；每小题1分，满分20分）
21. Our English teacher is ill and we are all ____ her health.
A. concerned about B. cared about C. interested in D. calm about
22. Judging by her ____, Mrs Smith must be a southerner.
A. pronunciation B. accent C. voice D. sound
